Triterpenes of Lantana tiliaefolia. 24-Hydroxy-3-oxours-12-en-28-oic acid, a new triterpene
- 1 January 1983
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 36 (12) , 2537-2547
- https://doi.org/10.1071/ch9832537
Abstract
The known triterpenes ursonic acid, oleanonic acid, ursolic acid, oleanolic acid and 24-hydroxy-3-oxoolean-12-en-28-oic acid occur in Lantana tiliaefolia Cham., together with a new triterpene,24-hydroxy-3-oxours-12-en-28-oic acid. A detailed 13C n.m.r. study has been made of a number of olean-12-enes and urs-12-enes, and the 1H n.m.r. signals from the secondary methyl groups in urs-12-enes have been investigated. N.m.r. evidence shows significant conformational differences in ring A between a number of 3-oxo derivatives that differ in their ring A substituents. Methyl ursonate and methyl oleanonate have been separated on columns of Spherosorb A5Y alumina.Keywords
This publication has 5 references indexed in Scilit:
- Biosynthesis of oleanene- and ursene-type triterpenes from [4-13C]mevalonolactone and sodium [1,2-13C2]acetate in tissue cultures of Isodon japonicus HaraJournal of the American Chemical Society, 1981
- Analysis of Cactus Pentacyclic Triterpenes by Reversed–Phase High–Performance Liquid ChromatographyPlanta Medica, 1978
- Conformational studies. Part 5. Functionalisation of methyl groups in 4,4-dimethyl steroidsJournal of the Chemical Society, Perkin Transactions 1, 1977
- New Triterpenes of Lantana camara. A Comparative Study of the Constituents of Several TaxaAustralian Journal of Chemistry, 1976
- Biosynthesis of ursene-type triterpenes from sodium [1,2-13C]acetate in tissue cultures of Isodon japonicus hara and re-assignments of 13C n.m.r. signals in urs-12-enesJournal of the Chemical Society, Chemical Communications, 1975